This distinctive handmade rollerball is made from African Blackwood, native to central and southern Africa, with screw-on cap in chrome.  It uses a Schmidt 888 fine rollerball refill in black, which is easy to replace when needed, and readily obtained on Amazon, and sometimes at local stationary stores.  It's hand turned on a lathe, sanded, and given a protective varnish. This is near black with little distinctive graining, very similar to ebony. The weight of the pen is 53 grams, with 0.50" diameter lower barrel and a 0.56" diameter cap.  Perfect for someone who likes a heavier, exotic, very dark wood pen and clean design.